Ground-penetrating radar (GPR) is a high-frequency electromagnetic method that can be applied to a number of engineering and environmental problems. A GPR system radiates short pulses of high-frequency EM energy into the ground from a transmitting antenna. This EM wave propagates into the ground at a velocity that is related to the electrical properties of subsurface materials (specifically, the materials relative dielectric permittivity). When this wave encounters the interface of two materials having different dielectric properties (i.e., utility and surrounding soils), a portion of the energy is reflected back to the surface, where it is detected by a receiver antenna and transmitted to a control unit for processing and display.